Manufacture of mailing tubes



(No Model.) A I A E. SANDS.

MANUFACTURE OF MAILING TUBES, CANS, &G No. 600,745. Patented Mar. 15, 1898.

JATENT EDWARD SANDS, OF CHICAGO, ILLINOIS.

MANUFACTURE OF MAILING TUBES, CANS, 800.

SPECIFICATION forming part of Letters Patent No. 600,745, dated March 15, 1898. Application filed May 28, 1897. Serial No. 638,550. (No model.)

To all whom it may concern.-

Be it known that I, EDWARD SANDS, of Ohicago, in the county of Cook and State of Illinois, have invented new and useful Improvements in the Manufacture of Mailing Tubes, Cans, and Like Articles, of which the following is a full, clear, and exact description.

The object of the invention is to provide certain new and useful improvements in the manufacture of mailing tubes, cans, and other articles made from sheet-s of paper, strawboard, and other material, and whereby the layers or laps after rolling the sheet into tubular form are securely united and at a comparatively low cost.

The invention consists principally of forming a tubular article from a sheet of paper, strawboard, or other material having one or more spaced strips of an adhesive substance of a high quality, such as glue, and a. coating of an adhesive substance of a low quality adjacent to the said strip or between the said strips.

Reference is to be had to the accompanying drawings, forming a part of this specification, in which similar characters of reference indicate corresponding parts in all the figures.

Figure 1 is a plan view of the sheet to be formed into a tube. Fig. 2 is a side elevation of the same partly rolled up, and Fig. 3 is a transverse section of the finished tube.

In making paper cans, mailing-tubes, and other tubular articles from sheets of paper, strawboard, &c, as heretofore practiced, the end of each sheet was fastened to the preceding ply or layer either by means of paste, glue, or like adhesive substance, of which the paste, although cheap, has been found impracticable, owing to the slowness in drying the tubes and the insecurity in its adhesive power. The use of glue, on the other hand, facilitates the formation of the tubes, but it is very expensive.

Now in order to render the tubes durable and allow of manufacturing the same cheaply I form the sheet A with one or more spaced strips B and B..of an adhesive substance of a high quality, such as glue, and the sheet adjacent to the strip B or between the said strips I provide with a coating 0 of an adhe- The strips B and B extend transversely of the sheet, and the strip Bis placed at one outer end of the sheet, while the strip 13 is placed at the starting-point for the second lap when the sheet is rolled up into a tube, as indicated in Fig. 2, 'so that the outer end of the sheet is securely united to the second layer or ply, as will be readily understood by reference to Figs. 2 and 3.

Now when the sheet is rolled into a tube the glue-strip B or both strips B and B dry or stick as soon as the sheet is rolled up, thus holding the tube, can, or whatever article it may be in its correct form or shape until the paste coating 0 dries and performs its share of the joining of the two laps of the sheet.

It is obvious that if the. tube or can be three-ply or more the saving in glue is increased accordingly, and it is further evident that but a small amount of glue is used, and consequently the tube can be cheaply manufactured without impairing the durability thereof.

The paste dries relatively slower than the glue, and when used alone is found to dry too slow for practical purposes, while the glue operates quickly, setting practically at the instant that the layers of the tube are rolled together; but the use of glue alone is too expensive, as glue suitable for the purpose costs at the present market rate eight cents per pound, while fiour of which paste is made costs at present but two and one-half cents per pound.

Now if paste alone is used it will dry so slowly that the tube will be out of shape when completed, while if glue alone is used the expense is a serious factor in marketing the product. Therefore I so make the tube as to secure the advantages of glue at a comparatively slight cost, as the glue strips or stripes will set instantly and hold the tube firmly in place during the slower operation of drying the paste, the area of thepaste-surface being much greater than that of the' narrow gluestrips on opposite sides thereof, as shown.

It will be seen that the relative drying of the paste and the glue is an important feature of my method, in the practice of which the strip is rolled into contact with the composite binding-surface, while the paste and glue composing said binding-surface are still in a moistened condition and the glue sets instantly and holds the tube during the slower drying of the greater area of paste. By this method it will be seen I am able to make at a comparatively small cost a tube possessing all the advantages incident to one held entirely by glue and manufactured at a much greater cost, as it is necessary in the making of the tubes that there should be a considerable lap of the sheet and that the opposite ends of such lap shall be securely held as well as the intermediate portion thereof.

I do not in this application claim, broadly,

a tube or the like consisting of a sheet rolled upon itself and having its lapped portion held together by a composite binding of a and having its.lapped portion'held together by a composite bindingcomposed of a strip of glue and an adjacent coating of paste of relatively greater area, the strip of glue being at the outer end of the sheet and the coating of paste extending to the starting-point for the second lap, as such construction forms the subject-matter of a separate application for patent filed by me December 31,1897, Serial No. 664,892.

Having thus fully described my invention, I claim as new and desire'to secure by Letters Patent- 1. A tube or the like consisting of a sheet rolled upon itself and having its lapped portion held together by a composite binding composed of strips or stripes of glue spaced apart and an intermediate coating of paste of relatively greater area, substantially as described.

2. A method of forming tubular bodies from sheets which consists in applying to the surface of the sheet at one end a binding composed of strips of glue and an intermediate coating of paste of arelatively slower drying quality and rolling the other end of the tube into contact with said binding while the latter is still in a moistened condition, the glue immediately setting and holding said parts together and retaining the tube in position during the slower drying operation of the paste, substantially as described.

3. A tube composed of a sheet rolled to cause one end to overlap the other and having the overlapped portions united by a composite binding consisting of narrow strips of glue at the opposite ends of the lapped portionand a relatively greater area of paste between said strips, substantially as described.

4. A method of forming overlapped bodies from sheets which consists in applying to the surface of the sheet'at one end a binding composedof a strip of glue and an adjacent coating of paste of a relatively slower drying quality, and rolling the other end of the tube into contact with said binding while the latter is still in a moistened condition, the glue immediately setting and holding the parts together and retaining the tube in position during the slower drying operation of the paste substantially as shown and described.

'EDWVARD SANDS.

Witnesses WM. PATTERSON, ARVID PAULsoN. 

